1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2013 04 03 N Status No replacement named L. Soreide, NA 2005 12 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1992 08 03 Released CE00E10109215018 C.C. Gray Controlled document at www.MATS Copyright 2013, Ford Global Tec
2、hnologies, LLC Page 1 of 5 STYRENE MALEIC ANHYDRIDE (SMA) COPOLYMER, WSH-M4D724-A3 RUBBER MODIFIED, 20% GLASS FIBER REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molding compound based on 20% glass fiber reinforced, rubber modified
3、 styrene maleic anhydride copolymer. The glass fibers are coated with a non-PVAC (polyvinyl acetate) binding agent. 2. APPLICATION This specification was released originally for material used for blower wheels. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and
4、 part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 1.5 - 3.0 g/ (ISO 1133/ASTM D 1238, 220 C, 10 kg) 10 minutes The material shall be dried for 2 h minimum at 90 C in a mechanical convection oven imm
5、ediately preceding the test. 3.4.2 Glass Fiber Content 18 - 21% (ISO 3451/1, Method A, at 650 +/- 25 C, test portion 2.5 - 3.0 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specimens. T
6、he following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allow
7、ed. ENGINEERING MATERIAL SPECIFICATION WSH-M4D724-A3 Copyright 2013, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 1.20 - 1.27 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 80 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 m
8、m/min) 3.5.4 Flexural Modulus, min 5.3 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius of the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.5 Shear Modulus at 23 C 1.24 - 2.06 GPa (ASTM D 40
9、65, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A. Specimen length between clamps 35-40 mm. Soak time at each temperature interval - 3 minutes minimum). Additionally, a Shear Modulus vs.
10、Temperature curve shall be plotted for -50 to +140 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test)
11、 3.5.6.1 At 23 +/- 2 C 6.0 kJ/m2 3.5.6.2 At -40 +/- 2 C 5.5 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5
12、 s. 3.5.7 Heat Deflection Temperature, min 116 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 1.82 MPa) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container fille
13、d with silica gel. 3.5.8 Vicat Softening Temperature, min 123 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temp. raise 50 +/- 5 C/h. Dial gage reset to 0 after addition of 5 kg weight. At 49.0 N load) ENGINEERING MATERIAL SPECIFICATION WSH-M4D724-A3 Copyright 2013, Ford Globa
14、l Technologies, LLC Page 3 of 5 All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged prope
15、rty values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength Change +/- 20% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change +/- 15% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Bur
16、n Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.6 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 70 Formation of excessive amounts of clear film or droplets is cause for rejection. 5. GENERAL INFORMATION The information give
17、n below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 5.3-6/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h a
18、t 23 +/- 2 C 0.2 - 0.4% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.05 - 0.10% ENGINEERING MATERIAL SPECIFICATION WSH-M4D724-A3 Copyright 2013, Ford Global Technologies, LLC Page 4 of 5 5.3 MELT VOLUME RATE 1.2 - 2.4 cm3/ (ISO 1133/ASTM D 1238, 220 C, 10 k
19、g) 10 minutes The material shall be dried for min of 2 h at 90 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLECTION TEMPERATURE, MIN 124 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) All specimens dry as molded. If not tested immediately after molding specimens must be stored in a sealed moisture-proof container filled with silica gel. 5.5 RECYCLING CODE SAE or SMA-GF20 OPTIONAL SMA-GF20 ENGINEERING MATERIAL SPECIFICATION WSH-M4D724-A3 Copyright 2013, Ford Global Technologies, LLC Page 5 of 5
